فهرست نشریات علمی دسترسی آزاد ایران

This study investigates the synthesis and plasma energy characterization of gold (Au) and cerium oxide (CeO₂) nanoparticles via pulsed laser deposition (PLD), with a focus on optimizing their structural and functional properties for biosensing applications. The conditions for the controlled fabrication of Au-CeO₂ nanoparticles by laser ablation were optimized (KrF 248 nm excimer laser, fluence: 2-10 J/cm²) and the dynamics of the plasma was investigated by optical emission spectroscopy (OES) and quadrupole mass spectrometry (QMS). The correlation between the key plasma parameters such as electron temperature (Tₑ = 1–2.6 eV) and density (nₑ = 10¹⁶–10¹⁸ cm⁻³) with laser energy was reported, where the higher energy the larger the intensities of the spectral lines and the plasma shielding effects. Au nanoparticles (14.4 nm crystallite size) and CeO₂ (27 nm particle size) were found to have face centered cubic (FCC) and cubic fluorite structures, respectively, with preferential orientation along the (111) plane, respectively, according to X-ray diffraction (XRD). The uniform morphologies were confirmed with field emission scanning electron microscopy (FE-SEM).